the box TA18

Don't buy this for home use if you have neighbors :D I did, couldn't turn it up more than 5% otherwise the whole house was resonating. Obviously, this is not a small speaker.

Recently I was finally able to push it to it's limits at a party, however after 7 hours of active use on nearly max (it was not limiting), it suddenly started to emit a weird noise, even when the voice cable was unplugged.

Turns out, there is a sponge like glue thingy fixing one of the components on the circuit board to prevent moving from the bass. This material melted, and made a short circuit.

Replacing that with a silicon based glue fixed the problem. I think this is a design flaw, because the material used initially on the circuit board can become conductive over time, probably due to the heat.